2. INDICATION MAINTENANCE B-61813E/03
2.2 INTERFACE MODULE (AIF01B) LEDS
¡ PWR ¡ LINK
A I F 0 1 B
Marking Name Description
PWR Power-on On: The interface module is supplied with power of
LINK Link On: The I/O Link is operating properly.
Normally, this LED lights several to ten-
odd seconds after the master is turned on.
Failures, their causes, and required actions
1) PWR is off.
Q Power (24 VDC) is not supplied or the supply voltage is
Þ Supply power of 24 VDC ±10%.
R The fuse in the interface module has blown.
Þ Eliminate the cause that made the fuse to blow, then
replace the fuse with a spare. (See Chapter 3.) The
following may cause the fuse to blow:
• A sum of power requirements for all input modules
exceeds the rating. (Refer to I-4.4)
• A voltage of +24 VDC, supplied from input module
AID32A1, AID32B1 or AID32H1 to the outside, is
short-circuited to the cabinet or the like.
• The interface module or any of the I/O modules is
S An I/O module is defective.
Þ Remove the I/O modules sequentially to pinpoint the
defective one. Then, replace it with a spare.